Governor for internal-combustion engines



Jan. 8, 1924. 1,486,309

C. R. SHORT ET AL Filed out. 25, 1919 365330 as 37 .1 5-23 43 :12 13 12 1- O 24 Paramed- J 8, 1924.

UNITED sures examine n. snonr AND ALnx Tenn,

OF DETROIT, MICHIGAH, ASSIGNORS TO GENERAL MOTORS CORPORATION, OF DETROIT, MICHIGAN, A. CORPORATION DELAWARE.

" GOVERNOR I03 INTERNAL-COMBUSTION ENGINES.

"Applioat ionzfiled October 25, 191a. Serial no. 333,290.

To all whom it may concern:

Be it known that we, CHARLES R. SHORT and ALEX TAUB, both citizens of the United States, and .residentsof Detroit, county of Wayne, and State of Michigan, have invented'certain new and useful Improvements in Governors 'for Internal-Combustion En gines, of which the following is a full, clear, concise, and exact description, such as will enable others skilled in the art to which the invention relates to make and use the same, reference being made therein to the accompanying drawlngs, which form a part of this specification. i

The present invention relates to. overnors for internal combustion engines, ing intended primarily for heavy duty service such as in connection with tractors.

A leading object is to provide a construction wherem the throttle valve is returned promptly toward open position upon increase of engine load. This is accomplished by so arranging the overnor spring that it operates j substantial directly on the throttle valve; added a vantages resulting therefrom are that the operation is rendered independent of slight wear in the connections between the speed responsive device which the speed responsive device is opposed, and for. sealing the spring in adjusted .relation. 3 e

Again, the invention provides fonreadily disassociating the levers and connecting linkage from the speed responsive device, this being efi'ected mainly by mounting the lever, upon which thespeed responsive device directly acts, in a detachable cover for said device. Y A further object .is to provide a housing for the linkage so arranged as to be assemand the throttle, and that the'size of the.

.11? on the shaft, it bei ,tively transmit torque.

" bled and disassembled in the act of securing which appear in section at the left side of .the figure being mvertical section, and 1 those at the ,right corresp'ondin to an in cllned .plane lndicated by'the line 1-1 of Fig. 2. Figure 2 is,a fractional end view corresponding thereto. Figure 3 is a view of the throttle valve housing, looking from the right in Fi re 1.

+1 and -2 in icate, respectively, lobe-like elements ofi'set laterally from the front end portion of the crankcasing proper and from the front cover plate, these elements, together-with the correspondin detachable end cover plates 3 and 4, forming a barrellike chamber wherein is positioned a drivmg gear 5 for the speed responsive device,

this gear in turn being driven by a timing gear 6 or other constantly driven gear. of

the engine. In the resent case the govaft 11, upon the reduced portion. 11' of which the gear 5 is mounted, is itself rotatable'in a detachable bushing 12 that is held in place in the cover plate by the set screws 13; and a collar 14 serves to hold the shaft from endwise movement. While the end of the bushing and shaft 11 are covered andsealed by a.cap 15 in the construction shown, it is evident that the shaft might be extended and connected to drive some other element such as a magneto.

Adjacent the portion 11, the shaft 11 is further reduced and referably slotted at 18 to;=-receive-a stampe ball-carrier-19 which is retained thereon by the nut 20 that also serves to clamp the gear against the shoulder observed that the particular ball carrier o'wn has tongues projecting into the slots 18 to more posi- The extreme outer end of the shaft 11 is again reduced to form a stem or guide 21 rotatable in a pressure plate or disc 22 that is also capable of movement along said. stem toward and from the ball carrier. The latter, in the construction shown, is shaped to form an inclined surface 19' and includes aspacer plate 23 slotted at 24 to loosely embrace corresponding balls 25 which are adapted to be thrown,

outwardly between said surface 19' and the disc 22 to thereby wedge the disc outwardly on the spindle 21 in accordance with the speed of the engine. Other functionall equivalent devices might'ot course be use Mounted interiorly of the cover 4, as by 'means of the pivot 28, is alever 29 arranged to be swung clockwise, Fig. 1, by the pressure plate upon increase of the en-'- gine speed.

'In Fig. 1, 30 indicates the. usual intake passage for the engine, said passage beingordinari ly disposed about mid-way in the length thereof and in this instance including a portion formed in a fitting 31 that is detachably connected to the remainder of the manifold structure and provided with a throttle valve 33. The usual carburetor the upper part of which is shown at 32 (including a manually operated throttle valve, not shown) is attached to the lower flange of the fitting as will-be obvious. It will be observed that the throttle shaft 34 projects into a housing chamber 35 formed on the side of the fitting and carries an operating arm or lever 36, and that thelatter is joined to the lever 29 through the 'medium of a 7 link 37 which is adjustable as to length as by means of the threaded connections 37' and locknuts 37". A- tension spring 38 connected to the link and arm construction 3637 in any suitable manner and anchored in a threaded adjusting cap 39 by passing its end 38 through an opening in the cap and'bending it over as indicated in'Figure setting the relative adjustment of the speed responsive devices in respect to the throttle valve, it is preferred to provide the fitting 31 with an opening 40 and to offset thecover 4 to form a chamber 41 for the end portion of the lever 29, said chamber having a threaded openingfacing towards the opening 40 so that when a pipe 42' is screwed therein it may then be entered into the opening 40 by the act of assemblingthe cover on the element 2. Conversely, to obtain access to the removable pin 43 whereby the link or rod 37 is joined to the arm 36, it is only necessary to remove the cover 44 of the fitting 31. Upon removal .of the pin 43 thus. '7

tubular member surrounding October, 1919.

freeing the link- 37 from the arm 36, the. cover carrying the lever 29 and thepipe' 4-2 may'be removed, together with the link 37 without disturbing the remaining parts. By

perforating the nut or cap 39 at one or more points 50, and by providing a wire 51 whose end may be soldered or otherwise sealed at the factory, the tendency of inexperienced operators to tamper with the adjustment of the parts is discouraged.

It will be understood that the, details df construction may be varied considerably without departing from the spirit and scope of the invention and therefore it is not desired that the invention should be limited to the specific structure herein described except as required by the pended claims.

We claim:

language of the ap- 1. In an internal combustion engine, a

crank casing having a chamber, a speed responsive device in said chamber, an end cover plate for said chamber, a lever pivoted at one end to said plate and arranged to be engaged by said device at an intermediate point, a throttle valve, a link oneiend' ofwhich is connected with saidvalve and the other end of which is connected with the free end of said lever, a chamber Within which the connection between the free end of said. link and said throttle valve is located, a removable cover closing an'opening through chamber, and a tubular member enclosing said link, said link, lever, and member being removable as a unit with said cover plate.

2. In an internal combustion engine, an intake passage, althrottle valve for controlling the flow therethrough, an operating arm for said valve, a casing within which said 5 which access may be had to said last-named arm is located and which casing is provided with an openingleading thereinto, a screw cap'in threaded engagement with the wall of said casing, a spring connected at one end to said :arm and the other end of, which is connected with said screw cap, a removable cover for closing the opening aforesaid, a ball governor actuated by the engine, a lever ,actuated by said governor, a-link intermediate the fre end of said lever and the free end of the operating" arm for said valve, a said link, a hollow cover plate within which said linkis housed and which cover plate provides a pivotal support for one end thereof and which casin v said to there y encloseth'e same.

In testimony where'of,we have signed our names to this specification this 21st day of CHARLES R. SHORT.

ALEX TAUB.

fits over the governorafore 

